Causes of Breast Lumps in Men

A male, 45-year old friend has confided in me that he has a small lump in his left breast. It is about 2 inches above his left nipple and hurts to the touch. The surrounding area is swollen. He?s had this problem for about three weeks now, but he won?t go and see his doctor. I know he is very worried about breast cancer. Could these symptoms be caused by other conditions? He is quite overweight and both drinks and smokes.